I posted this message about 2 weeks ago:
My 1592 engine has always run hot (around 180). This weekend it got
> REAL hot (195 and 3 quarts of water in 100 miles).
> There are no leaks. Pressure test is fine. I pulled the thermostat
and
> boiled it. It opens properly. The coolant is just plain boiling out.
> I pulled the rad today, and flushed it out from bottom to top. No
crud
> came out, it was just clear water. I am taking it to a rad shop
> tomorrow for a "flow test". I am unfamiliar with this procedure. Is
it
> any different than what I just did? If the flow test checks out, I
plan
> to pull the hose off the water pump at the water jacket input with the
> rad on and full, and the engine running, and see if the water pump is
> pumping. Is this correct procedure? What do I do if everything
except
> the water jacket checks out? There is about 10,000 miles on the
> engine, which was boiled out before reassembly. Hints? Tips?
> Terry McKitrick
> 1960 Series I
The results are in: There was a hairline crack at the top front of the
radiator, on the passenger side. By the time enough pressure had built
up to cause it to leak, the coolant (mostly water by the time I got home
and started looking for the source),
blew back and dissapated through the fan, hit the hot engine, and
evaporated right away. Hence the trouble finding the leak. An
underwater pressure test found it. Thanks to all those who replied.
Terry McKitrick
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